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CAS-005 · Question #152

Which of the following best describes the advantage of homomorphic encryption when compared to other encryption methodologies?

The correct answer is A. The need for a pre-shared key is removed.. The question asks about the unique advantage of homomorphic encryption, which allows computations to be performed directly on encrypted data.

Submitted by marco_it· Mar 6, 2026Security Engineering

Question

Which of the following best describes the advantage of homomorphic encryption when compared to other encryption methodologies?

Options

  • AThe need for a pre-shared key is removed.
  • BResource utilization is lower.
  • CSupport for field-specific tokenization is added.
  • DData integrity is protected by advanced hashing routines.

How the community answered

(31 responses)
  • A
    74% (23)
  • B
    3% (1)
  • C
    16% (5)
  • D
    6% (2)

Why each option

The question asks about the unique advantage of homomorphic encryption, which allows computations to be performed directly on encrypted data.

AThe need for a pre-shared key is removed.Correct

Homomorphic encryption allows computations to be performed directly on encrypted data without first decrypting it, meaning the entity performing the computation (e.g., a cloud provider) does not need access to the private key or a pre-shared key to decrypt the plaintext. This distinct advantage enables processing by untrusted parties while maintaining data confidentiality, as the key for decryption remains solely with the data owner.

BResource utilization is lower.

Homomorphic encryption is computationally intensive and generally has significantly higher resource utilization compared to standard encryption schemes due to its complexity.

CSupport for field-specific tokenization is added.

Tokenization is a distinct data security technique that replaces sensitive data with non-sensitive substitutes; it is not inherent to or an advantage of homomorphic encryption.

DData integrity is protected by advanced hashing routines.

Data integrity is typically ensured through message authentication codes (MACs) or digital signatures, which are separate from the core function of homomorphic encryption (computation on ciphertext).

Concept tested: Homomorphic encryption advantages

Source: https://learn.microsoft.com/en-us/security/security-fundamentals/data-encryption-rest-transit#homomorphic-encryption

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